Do you know what are the layers of computer science? This article talks about various types of computer networks and their functions.
1: _ conversion is the process of changing one of the characteristics of an analog signal based on the information in the digital data.
|
| a. Digital-to-analog |
| b. Analog-to-analog |
| c. Analog-to-digital |
| d. Digital-to-digital |
Answer: (a) Digital-to-analog
2: _______ encoding has a transition at the beginning of each 0 bit.
|
| a. RZ |
| b. Manchester |
| c. Differential Manchester |
| d. All the above |
Answer: (c) Differential Manchester
3: _______ encoding has a transition at the middle of each bit.
|
| a. RZ |
| b. Manchester |
| c. Differential Manchester |
| d. All the above |
Answer: (d) All the above
4: _______ signals can have only a limited number of values.
|
| a. Analog |
| b. Digital |
| c. (a) or (b) |
| d. None of the above |
5: ________ is a type of transmission impairment in which an outside source such as crosstalk corrupts a signal.
|
| a. Attenuation |
| b. Distortion |
| c. Noise |
| d. Decibel |
6: __ is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium.
|
| a. Attenuation |
| b. Distortion |
| c. Noise |
| d. Decibel |
7: ________ is the process of converting digital data to a digital signal.
|
| a. Block coding |
| b. Line coding |
| c. Scrambling |
| d. None of the above |
8: ________ provides synchronization without increasing the number of bits.
|
| a. Scrambling encoding |
| b. Line coding |
| c. Block coding |
| d. None of the above |
Answer:(a) Scrambling encoding
9: __ uses two carriers, one in-phase and the other quadrature.
|
| a. ASK |
| b. PSK |
| c. FSK |
| d. QAM |
10: _________ conversion is the representation of analog information by an analog signal.
|
| a. Digital-to-analog |
| b. Analog-to-analog |
| c. Analog-to-digital |
| d. Digital-to-digital |
Answer: (b) Analog-to-analog